Sanders County, MT

116 public highway bridges

Sanders County Bridge Snapshot

Sanders County, Montana contains 116 public highway bridges in the FHWA National Bridge Inventory. Roughly 37.9% are rated “Good,” 54.3% “Fair,” 7.8% “Poor,” and 7.8% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in MT are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

116

Total Bridges

37.9%

Good

7.8%

Poor

7.8%

Structurally Deficient

Condition Distribution

Good

37.9% (44)

Fair

54.3% (63)

Poor

7.8% (9)

SD

7.8% (9)

All Bridges (116)

Sort:

RD 7670

Over: BEATRICE CR

BEATRICE CR, Sanders, MT

Built 1959 Load: 16.2 t ADT: 50

NO DATA ENTERED

Over: VERMILION RIVER

NO DATA ENTERED, Sanders, MT

Built 1956 Load: 16.8 t ADT: 50

TROUT CREEK RD

Over: TROUT CREEK 025

2M W TROUT CREEK, Sanders, MT

Built 1982 Load: 17.2 t ADT: 100

RD 7593

Over: RADIO CR

BEND VERMILLION, Sanders, MT

Built 1955 Load: 18.1 t ADT: 50

NOXON AVE E

Over: CABINET GORGE RESV 047

NOXON, Sanders, MT

Built 1922 Load: 18.1 t ADT: 100

NO DATA ENTERED

Over: VERMILION RIVER

NO DATA ENTERED, Sanders, MT

Built 1965 Load: 18.5 t ADT: 50

RD 7593

Over: FISHTRAP CREEK

BEND VERMILLION, Sanders, MT

Built 1954 Load: 18.8 t ADT: 50

RD 56

Over: W F THOMPSON RIV

THOMPSON RIVER, Sanders, MT

Built 1935 Load: 19.8 t ADT: 50

IRR - S 28

Over: HOT SPRINGS CREEK

2M NE CAMAS, Sanders, MT

Built 1959 Load: 20.0 t ADT: 2,140

RD 153

Over: CLEAR CR

CLEAR CR, Sanders, MT

Built 1968 Load: 20.1 t ADT: 50

RD 7583

Over: W FORK SWAMP CR

BEMISH CR, Sanders, MT

Built 1970 Load: 20.4 t ADT: 50

RD 153

Over: CLEAR CR

CLEAR CR, Sanders, MT

Built 1968 Load: 20.4 t ADT: 50

WHITEPINE CR RD

Over: BEAVER CREEK 022

2 NW WHTE PINE, Sanders, MT

Built 1982 Load: 20.9 t ADT: 100

BEND RD

Over: THOMPSON RIVER 040

30M SW MARION, Sanders, MT

Built 1991 Load: 20.9 t ADT: 100

S 200

Over: CLARK FORK RIVER

PARADISE, Sanders, MT

Built 1997 Load: 20.9 t ADT: 2,835

NO DATA ENTERED

Over: BEAVER CREEK

NO DATA ENTERED, Sanders, MT

Built 1965 Load: 21.1 t ADT: 20

RD 367

Over: GRAVES CR

GRAVES VERMILLION, Sanders, MT

Built 1954 Load: 21.7 t ADT: 50

RD 7688

Over: W FK FISHTRAP

LOWER FISHTRAP RIDG, Sanders, MT

Built 1965 Load: 21.7 t ADT: 40

S 200

Over: BULL RIVER

4M NW NOXON, Sanders, MT

Built 1952 Load: 21.8 t ADT: 1,508

IRR - S 382

Over: FLATHEAD RIVER

1M E PERMA, Sanders, MT

Built 1965 Load: 22.7 t ADT: 384

S 56 FH 5

Over: BULL RIVER

17M NW NOXON, Sanders, MT

Built 1960 Load: 23.6 t ADT: 679

NO DATA ENTERED

Over: MILLER CR

NO DATA ENTERED, Sanders, MT

Built 1956 Load: 25.3 t ADT: 20

NO DATA ENTERED

Over: N FK E FK BULL RIVER

NO DATA ENTERED, Sanders, MT

Built 1960 Load: 25.3 t ADT: 50

S 200

Over: RR

3M NW NOXON, Sanders, MT

Built 1957 Load: 25.4 t ADT: 1,508

S 200

Over: CLARK FORK RIVER

1M NW TROUT CREEK, Sanders, MT

Built 1958 Load: 25.4 t ADT: 2,030

NO DATA ENTERED

Over: MIDDLE FK BULL RIVER

NO DATA ENTERED, Sanders, MT

Built 1995 Load: 25.6 t ADT: 50

RD 7609

Over: FISHTRAP CREEK

FISHTRAP CREEK, Sanders, MT

Built 1957 Load: 25.9 t ADT: 50

BLUE SLIDE RD

Over: VERMILLION RIVER

3M E TROUT CREEK, Sanders, MT

Built 1972 Load: 25.9 t ADT: 222

NO DATA ENTERED

Over: GREEN GULCH

NO DATA ENTERED, Sanders, MT

Built 1962 Load: 26.2 t ADT: 50

RD 217

Over: W FK SWAMP CR

W FK SWAMP CR, Sanders, MT

Built 1965 Load: 26.2 t ADT: 50

NO DATA ENTERED

Over: WHITE PINE CR

NO DATA ENTERED, Sanders, MT

Built 1960 Load: 27.5 t ADT: 30

RD 7670

Over: BEATRICE CREEK

BEATRICE CR, Sanders, MT

Built 1959 Load: 27.9 t ADT: 50

LIL BITTERROOT RD

Over: LITTLE BITTERROOT 074

12M W RONAN, Sanders, MT

Built 1986 Load: 28.1 t ADT: 100

IRR - S 28

Over: LITTLE BITTERROOT RIVER

1M N LONEPINE, Sanders, MT

Built 2010 Load: 28.1 t ADT: 1,842

MARTEN CREEK RD

Over: MARTEN CREEK 026

7M S NOXON, Sanders, MT

Built 1968 Load: 28.8 t ADT: 170

BIRDLAND BAY RD

Over: CLARK FORK RIVER 001

2M W THOMPSON FALLS, Sanders, MT

Built 1928 Load: 29.0 t ADT: 100

S 200

Over: CLARK FORK RIVER

2M S PARADISE, Sanders, MT

Built 1996 Load: 29.0 t ADT: 2,835

EMERSON RD

Over: LITTLE BITTERROOT RV 092

9M NE HOT SPRINGS, Sanders, MT

Built 2002 Load: 29.8 t ADT: 100

S 56 FH 5

Over: BULL RIVER

13M NW NOXON, Sanders, MT

Built 1971 Load: 29.9 t ADT: 679

NO DATA ENTERED

Over: MCGINNIS CREEK

NO DATA ENTERED, Sanders, MT

Built 1960 Load: 30.5 t ADT: 40

NO DATA ENTERED

Over: WHITEPINE CR

NO DATA ENTERED, Sanders, MT

Built 1961 Load: 30.8 t ADT: 50

SLOAN RD

Over: FLATHEAD RIVER 075

10M W RONAN, Sanders, MT

Built 1972 Load: 30.8 t ADT: 100

MARTEN CREEK RD

Over: TROUT CREEK 054

1M W TROUT CREEK, Sanders, MT

Built 2010 Load: 31.8 t ADT: 170

UPPER RIVER RD

Over: ELK CREEK 048

2M SE HERON, Sanders, MT

Built 1992 Load: 32.7 t ADT: 100

BIG BEAVER CREEK R

Over: LITTLE BEAVER CREEK 018

11M NW THOMPSON FALLS, Sanders, MT

Built 1978 Load: 32.7 t ADT: 100

BIG BEAVER CREEK R

Over: BEAVER CREEK 019

12M NW THOMPSON FALLS, Sanders, MT

Built 1978 Load: 32.7 t ADT: 100

LIL THOMPSON R RD

Over: LITTLE THOMPSON RIV 091

19M N PLAINS, Sanders, MT

Built 1974 Load: 32.7 t ADT: 40

CHERRY CREEK RD

Over: PROSPECT CREEK 005

1M SW THOMPSON FALLS, Sanders, MT

Built 1973 Load: 32.7 t ADT: 100

HEWOLF DR

Over: VALLEY CREEK 015

7M SE DIXON, Sanders, MT

Built 1991 Load: 32.7 t ADT: 100

S 471 FH 7

Over: PROSPECT CREEK

14M W THOMPSON FALLS, Sanders, MT

Built 1979 Load: 32.7 t ADT: 135

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 5, 2026